[Jahay]

neil thanks for the help... I didnt know the motor was capable of 60000rpm...
If that is the case, my current gearing which is:

Differential Ratio: 3.2222222222222223
Transmission Ratio: 1.5366847826086956
Other Ratio: 1
Spur Tooth Count: 47
Pinion Tooth Count: 17
Total Voltage: 25.2 - rated at 4.2V per cell when fully charged.
Motor KV: 1600
Tire Diameter (inches): 5.5
Tire Ballooning (inches): 0.5
Motor Current Draw: 0
Motor Coil Resistance: 0
Spur/Pinion Ratio: 2.76 : 1
Total Ratio: 13.68955 : 1
Tire Circumference (inches): 20.42 inches (518.68 mm)
Rollout: 1.49:1
Total Motor Speed: 40320 RPM NO WHERE NEAR 60,000rpm!!!
Vehicle Speed: 56.95 mph (91.49 km/h)
Effective KV Value: 1600
KT constant: 0.85 oz-in/A

This is on 6s rated at 4.2v not 3.7v... and what i would be running most of the time.... only 40000rpm!!!!!
You say that this motor is rated to 600000 so theoretically with a better speed controller i could run 8s for road use as not to cause the motor or esc any harm... Is this really possible???

This is the same gearing but on 8s


Differential Ratio: 3.2222222222222223
Transmission Ratio: 1.5366847826086956
Other Ratio: 1
Spur Tooth Count: 47
Pinion Tooth Count: 17
Total Voltage: 33.6 - 8s rated at 4.2V per cell
Motor KV: 1600
Tire Diameter (inches): 5.5
Tire Ballooning (inches): 0.5
Motor Current Draw: 0
Motor Coil Resistance: 0
Spur/Pinion Ratio: 2.76 : 1
Total Ratio: 13.68955 : 1
Tire Circumference (inches): 20.42 inches (518.68 mm)
Rollout: 1.49:1
Total Motor Speed: 53760 RPM - still well below the 60,000 rpm mark!
Vehicle Speed: 75.94 mph (121.99 km/h) - I WOULD BE HAPPY WITH THIS FOR ROAD USE!
Effective KV Value: 1600
KT constant: 0.85 oz-in/A

If this is correct... i doubt i would need to start building a twin motor savage or increasing motor size!!! This would make me happy as i would rarely run 8s, but knowing i can makes me happy lol just need an appropriate HV ESC.

please confirm this neil before i get too excited